Process of forming pin ticket staples



April 18, 1939. K, MAR H 2,155,168

PROCESS OF FORMING PIN TICKET STAPLES Filed July 9, 1957 Patented Apr. 18, 1939 UNITED STATES PATENT OFFICE PROCESS OF FORMING PIN TICKET STAPLES tion of New York Application July 9, 1937, Serial No. 152,709

3 Claims.

This invention relates to pin tickets and to processes for making the same.

It is an object of the invention to provide a pin ticket having a wire staple secured thereto, 5 the free ends of which form pins which are free of burrs or other jagged edges which may damage fabrics.

Other objects and advantages of the invention will appear hereinafter.

A preferred embodiment of the invention selected for purposes of illustration is shown in the accompanying drawing, in which,

Figure 1 is a side elevation of a pin ticket.

Figure 2 is a greatly enlarged elevation of a square cut pin.

Figure 3 is a greatly enlarged front elevation of a pin as formed prior to coating, and showing the forming tool.

Figure 4 is a similar view showing a modified form of pin.

Figure 5 is a side elevation of the forming tool.

Figure 6 is a view, partly in section of the conical form of pin after the coating is applied, and

Figure 7 is a similar view of the round form of pin.

According to the present invention I propose to cut off the wire of which the staple is formed substantially at right angles so that the ends of the wire, which form the pins, will be square cut as illustrated in Figure 2. I then propose to reform the square cut ends of the pins in order to enable them to penetrate the merchandise more easily. This reforming operation may be accomplished by a turning or shaving operation as hereinafter described. For this purpose a tool i is provided having a base portion 2 and a projecting relatively thin web portion 3 having its upper edge 4 cut away as at 5 to provide any desired shape for the end of the pin. As illustrated in Figure 3, the cut away portion is a substantially V-shaped notch adapted to provide a substantially frusto-conical shaped pin end 6, the said pin end being frusto-conical rather than conical because the metal of which the pins are formed tends to break off near the apex of the cone. This conical form of pin is very useful in connection with merchandise which is difficult to penetrate, such as leather, closely woven textile fabrics and the like.

In the case of other more easily penetrable merchandise, however, a round pointed pin may be more desirable than the conical form. In this case, as illustrated in Figure 4, the cut away portion is a substantially semi-circular notch adapted to provide a substantially hemispherical shaped pin end 1.

In either case, the tool I is mounted in a suitable chuck (not shown) and rotated at relatively high speed. The pin end is then brought into contact with the notch which rapidly abrades the metal to form the desired shape.

Subsequently, the said ends are dipped in a suitable fluid coating medium such as molten tin. This coats the cut surfaces of the wire, including the hemispherical surface of the round endedpin and the conical surface and the flat end surface of the conical shaped pin, and covers any burrs or jagged edges which may have been formed during the previous operations. Preferably the coating medium should be of sufficient fluidity to provide a relatively thin coating when the prongs are dipped. This coating should preferably be of substantially uniform thickness on the cut surfaces. On the flat end surface of the conical shaped pins, however, it is found that the surface tension causes the coating to assume a substantially hemispherical shape which provides an excellent point for the penetration of fabrics.

Referring to Figure 3, it will be observed that the edges of the staple end have been bevelled to provide the conical surfaces 6, but leaving the end surface 8 so that the form of the staple end is that of a truncated cone. The staple end is coated with suitable coating material. The layer 9 of coating material on the conical surfaces is of substantially uniform thickness, but on the flat end surface, the coating assumes a substantially hemispherical shape due to the effect of surface tension. This coating covers any burrs or jagged edges which may have been left by the bevelling operation, and the rounded coating of the end surface provides a point which penetrates fabrics very readily.

Referring to Figure '7, the hemispherical surface has been provided with a layer ID of coating material of substantially uniform thickness which provides a smooth round point for the pin,

It will be understood that the invention may be variously modified and embodied within the scope of the subjoined claims.

I claim as my invention: 50

1. Process of forming a pin ticket staple which comprises cutting off a length of wire at substantially right angles so as to form square cut ends, shaving off the edges of said ends with a rapidly rotating tool having a cutting edge layer of coating material or substantially uniform thickness.

3. Process of forming a pin ticket staple which comprises cutting off a length of Wire at substantially right angles 30 as to form square cut ends, and shaving ofi the edges of said ends with a rapidly rotating tool having a cutting edge adapted to form pointed ends.

ALONZO K. MARSH. 

